Friction-plug rubber heel.



F. BERENSTEIN. FRICTION PLUG RUBBER HEEL.

APPLICATION FILED NOV- H, I915.

1,173,088. Patented Feb. 22, 1916.

UNHE

FRANK BERENSTEIN, OF CHELSEA, MASSACHUSETTS.

FRICTION-PLUG RUB R. HEEL.

Specification of Letters Patent.

Patented Feb. 22, rate.

Application .filed November 11, 1915. 'Serial No. 60,951.

To all Ic/wm 1'2- mu comrern:

Be it known that I, FRANK BERENSTEIN, a citizen of the lfnitcd States, resident of Chelsea. in the county of Suffolk and State of Massachusetts. have made a certain new and useful Invention in Friction-Plug Rubbcr .lleels: and I declare the following to be a full. clear, and exact description of the same. such as will enable others skilledin the art to which it appertains to make and use the invention. reference being had to the accompanying drawings, and to letters or figures of reference marked thereon,'which form a part of this specification.

Figure 1 is a bottom plan view of the invention. Fig. 2 1s a section on the line 2-2 Fig. 1. Fig. '3 is a detail v'ie\\"sho\\-'ing the nail, the post and the washer in perspective.

The invention has relation to rubber heels, and particularly to friction plugs for such heels and other tread members, having for its object certain improvements upon the Patent No. 1,129,672, of S. J. Harris, the object being to accomplish a better union between the bracing means or post and the canvas plug and to avoid liability ofthe postscratching polished floors.

The invention consists in the novel construction and combinations of parts, as hereinafter set forth.

In the accom 'ianying drawings, illustrating the invention. the numeral 2 designates the wear lift of the rubber heel, and 3 the upper lift of said heel.

The plug in the present case consists of a back plate 4:, usually of circular form and of metal. of the same or a little less in diameter than that of the plug proper 5, which is wound from a strip of frictionized canvas or other suitable rubber-coated material and is provided with a central perforation 5.

(3 is the post, located within the perforation of the plug proper and formed of a material different from that of the back plate. usually of hard rubber, although indurated fiber or hot pressed paper or the like may be used. the object being to provide a post of material to which the rubber-coated material of the plug proper will adhere or be united more closely in the manufacture of the heel, to form a unitary article, and at the same time to avoid liability "of the post scratching or marring polished floors, said post having still the function of holding the plug in position-in the heel, and the greater adherence of the rubber-coated material of the plug proper to the post being needed, inasmuch as the special post of said patent, for holding the plug proper in position, is done away with. And inasmuch as the post is formed of a material different from that of the back plate, it is necessary to make the post separate from the back plate.

The fastening nail 7 has its head engaged within the perforation of the hollow post and its shank engaged with the center perforation of the metal back plate. The perforation of the back plate is of smaller size than that of the hollow post, and is provided with a marginal portion overlying the top of the perforation of the post and adapted to be engaged by and back up the head of said nail.

I claim:

In a rubber heel having a recess, a hollow cylindrical plug of rubber'coated fabric material located within and cemented to the side wall of said recess, a metal back plate extending across and having bracing engagement with the top of said plug, and a central hollow postvfitting within the perforation of said plug and separate from said back plate, said post being of a non-metallic material comparatively soft with relation to Said back plate and to which the rubber-coated mate rial of the plug proper will closely adhere, the interior diameter of said post beingcomparatively large to receive the head of a fastening device, and said back plate having a central perforation of small size to receive the shank of said device, the marginal portion of said back plate surrounding the central perforation thereof extending across the perforation of the post and acting as a backing for the head of said device.

In testimony whereof I affix my signature, in presence of two witnesses.

FRANK BERENSTEIN. Witnesses:

SlUART HILDER, Grocer M. ANDERSON.

flopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, Z). 8. 

